The current version of rtlwifi for USB operations uses kmalloc to
acquire a 32-bit buffer for each read of the device. When
_usb_read_sync() is called with the rcu_lock held, the result is
a "sleeping function called from invalid context" BUG. This is
reported for two cases in https://bugzilla.kernel.org/show_bug.cgi?id=42775.
The first case has the lock originating from within rtlwifi and could
be fixed by rearranging the locking; however, the second originates from
within mac80211. The kmalloc() call is removed from _usb_read_sync()
by creating a ring buffer pointer in the private area and
allocating the buffer data in the probe routine.
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org> [This version good for 3.3+ - different patch for 3.2 - 2.6.39]
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

In usb.c, routine _rtl_usb_init_sw() always returns 0, and rtl_usb_probe()
never checks the returned value. Thus we can change _rtl_usb_init_sw() to
a void routine. In addition, remove the underscore at the beginning of the
name of the routine.
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

In the unlikely event of a misread of the USB end point count, the driver
generates a divide fault. To prevent this, add a check of the value
returned by _rtl_usb_init(). In addition, add some logging to indicate
why the condition occurred.
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This patch addresses a kernel bugzilla report and two recent mail threads.

The kernel bugzilla report is https://bugzilla.kernel.org/show_bug.cgi?id=42632,
which reports a udev timeout on boot.

The first mail thread, which was on LKML (http://lkml.indiana.edu/hypermail/
linux/kernel/1112.3/00965.html) was for a WARNING that occurs after a
suspend/resume cycle for rtl8192cu.

The scond mail thread (http://marc.info/?l=linux-wireless&m=132655490826766&w=2)
concerned changes in udev that break drivers that delay while firmware is loaded
on modprobe.

This patch converts all rtlwifi-based drivers to use the asynchronous firmware
loading mechanism. Drivers rtl8192ce, rtl8192cu and rtl8192de share a common
callback routine. Driver rtl8192se needs different handling of the firmware,
thus it has its own code.
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Although the rtlwifi family of devices contains 11 copies of the pr_fmt
macro, the macro is not defined for all routines that need it. By moving
the macro to wifi.h, a single copy is available for all routines.
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

In https://bugzilla.redhat.com/show_bug.cgi?id=771656, a kernel bug was
triggered due to a failed skb allocation that was not checked. This event
lead to an audit of all memory allocations in the complete rtlwifi family
of drivers. This patch fixes the rest.
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Consolidate printks to avoid possible message interleaving
and reduce the object size.

Remove unnecessary RT_ASSERT parentheses.
Align arguments.
Coalesce formats.
Remove unnecessary __func__ use as the macro uses it.

$ size drivers/net/wireless/rtlwifi/built-in.o*
   text	   data	    bss	    dec	    hex	filename
 588901	  55333	 127216	 771450	  bc57a	drivers/net/wireless/rtlwifi/built-in.o.new
 590002	  55333	 127560	 772895	  bcb1f	drivers/net/wireless/rtlwifi/built-in.o.old
Signed-off-by: NJoe Perches <joe@perches.com>
Acked-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Consolidate printks to avoid possible message interleaving
and reduce the object size.

Remove unnecessary RT_TRACE parentheses.

Miscellaneous typo and grammar fixes.
Add missing newlines to formats.
Remove duplicate KERN_DEBUG prefixes.
Coalesce formats.
Align arguments.

$ size drivers/net/wireless/rtlwifi/built-in.o*
   text    data     bss     dec     hex filename
 594841   55333  129680  779854   be64e drivers/net/wireless/rtlwifi/built-in.o.new
 607022   55333  138720  801075   c3933 drivers/net/wireless/rtlwifi/built-in.o.old
Signed-off-by: NJoe Perches <joe@perches.com>
Acked-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Make the macros a bit more readable.

Use do {...} while (0) without terminating semicolons.
Add missing terminating semicolon to a few uses.
Signed-off-by: NJoe Perches <joe@perches.com>
Acked-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rtlwifi/usb.c: In function ‘_usb_read_sync’:
drivers/net/wireless/rtlwifi/usb.c:102:6: warning: ‘status’ may be used uninitialized in this function
drivers/net/wireless/rtlwifi/usb.c:102:6: note: ‘status’ was declared here

My compiler is dumb, but better to eliminate the warning than to have
anyone waste time evaluating this again...
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
Acked-by: NLarry Finger <Larry.Finger@lwfinger.net>

Driver rtlwifi fails on a big-endian host.

These changes have been tested on a Mac PowerBook G4, which has
a PPC processor.

Although this patch touches some of the code that will affect endian
issues on PCI hardware through drivers rtl8192ce, rtl8192se, and
rtl8192de, these have not been tested due to lack of suitable hardware.
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Driver rtl8192cu writes the firmware with 32-bit asynchronous writes. This
design is OK for USB 2.0 adapters, but the current implementation of
xhcu-hcd has a limited ring size, which is exceeded. By converting to
synchronous block writes, this error is avoided.
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

The USB driver does not retry reads - allow 10 tries.
Signed-off-by: NGeorge <george0505@realtek.com>
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

These were getting the macros from an implicit module.h
include via device.h, but we are planning to clean that up.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

drivers/net: Add export.h to wireless/brcm80211/brcmfmac/bcmsdh.c

This relatively recently added file uses EXPORT_SYMBOL and hence
needs export.h included so that it is compatible with the module.h
split up work.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Driver rtl8192cu assigns a new struct rtl_tcb_desc object, but fails to
clear it.
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@kernel.org>  [2.6.39+]
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Use the current logging styles.
Add pr_fmt where appropriate.
Remove now unnecessary prefixes from printks.
Convert hard coded prefix to __func__.
Add a missing "\n" to a format.
Signed-off-by: NJoe Perches <joe@perches.com>
Acked-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Convert usb routines for addition of RTL8192SE and RTL8192DE code
Signed-off-by: NChaoming_Li <chaoming_li@realsil.com.cn>
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Convert core routines for addition of RTL8192SE and RTL8192DE code.

Additional files are changed to allow compilation.
Signed-off-by: NChaoming_Li <chaoming_li@realsil.com.cn>
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Change base routines for addition of RTL8192SE and RTL8192DE code.

Additional files are modified to allow compilation.
Signed-off-by: NChaoming_Li <chaoming_li@realsil.com.cn>
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Some compiler/architecture combinations generate some warnings that are
not seen on my main system. Two of the "warnings" about unitialized variables
are really bugs.
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Drivers rtlwifi, and rtl8192ce generate a large number of
sparse warnings. This patch fixes most of them.
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Modify some rtl8192ce routines for merging with rtl8192cu. In addition,
remove some usage of Hungarian notation.
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: NGeorge <george0505@realtek.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>